Serena Williams and her sister Venus are in talks to become part-owners of the NFL's Miami Dolphins.

"There have been preliminary talks and hopefully it will work out," Serena Williams said after her second-round win over Kazakhstan's Yaroslava Shvedova at the Toronto Cup. "That would be a great opportunity for both of us. We'll see what happens, you never know."

If they did acquire a stake in the Dolphins, the Williams sisters would join the musicians Jimmy Buffet and Gloria and Emilio Estefan, who became minority partners in the team earlier this year.

The Williamses, who live in Palm Beach Gardens, Florida, are not thought to be big NFL fans but view the Dolphins as a vehicle to promote themselves.

"Venus and I are always trying to expand our brand," said Williams. "If the opportunity presents itself we would love to see where it can take us. Hopefully we'll be able to expand our brand."